Pump construction



'Jhly 13 1926. 1,592,587

R. 5. WILSON PUMP CONSTRUCTION Filed Dec. 51, 1925 5 Sheets-Sheet 1 "1' I fig %///5 R. E. WILSON PUMP CONSTRUCTION July 13, 1926. 1,592,587

Filed Dec. 51 1923 3 Sheets-Sheet 2 \July 13,1926. 1,592,587

R. E. WILSON PUMP CONSTRUCTION Filed Dec. 51 1923 3 Sheets-Sheet 5 I l- I A $00 war??? I lustrated.

In the drawings, the numeral 5 indicates Patented my 13, 1926.

j UNITED STATES PATENT OFFICE.

ROBERT WILSON, OF CHICAGO, ILLINOIS. -ASSIGNOR TO STANDARD OIL COMPANY. OF WRITING, INDIANA, AND CHICAGO, ILLINOIS, A CORPORATION OF INDIANA.

PUMP CONSTRUCTION Application filed December 31, 1923.. Serial 'No. 683,741.

The present invention relates .to improvements 1n pump construction and more particularly to the construction of pumps intended for the, dispensing of amounts of ii uid, such as gasoline, having related fixed va ues,-for example, volumes having the value. of twenty-five cents, fifty cents, seventy-five cents or one dollar, at-varying prices per gallon.

The invention will be fully understood from the following'description, illustrated by the accompanying drawings in which:

Figure 1 isa vertical sectional view through'the head of a pump casing embodyingrthe present invention;

ig. 2 is a partialsectional view on the line 2-2'of Fig. 1; Fig. 3 is a side elevation of the device shown in Fig. l; and

Fig. 4 is a view of the cam employed in the specific'embodiment of the invention ilthe casing of a pump in which is mounted a suitable type of reciprocating pump, the pum piston rod projecting as indicated at 6. gurmounting the casing 5 is a smaller casing 7, in which the end of the pump piston rod reciprocates and in which is also provided the device constructed in accordance with the present invention for determining the quantities of gasoline or other liquid dispensed by the pump.

Within the casing 7 are mounted a vertical rod 8 and a second vertical rod 9 spaced a short distance therefrom. slidably mounted upon the rod 8 are the sliding members 10, each of which has projecting lugs 11 forming a yoke. The rod 9 passes through eyes formed in these projecting lugs 11, the sliding members 10 being-also slidable thereon. Within the yoke formed by the projecting lugs 11 of each of the sliding members 10' there is pivotally mounted upon the rod 9 a stop lug or member 12. The movement of these lugs on the rod 9 is controlled by means of links 13, of which one is connected to each pivoted lug 12 and extends to the exterior of the casing, and is there provided with .a suitable handle 14. The stop lu s 12 are so constructed that, upon being pifiled by links 13 into alignment with the rods 8 and 9, they are in the path of the reciprocable piston rod 6. Each of the lugs 12 is provided with an adjusting screw to he engaged by the piston rod and to determine exactly the limit of movement of the latter, thereby controlling the volume of liquid delivered by the pump. By means ofthe links 13 the stop lugs 12 may be moved out of rod 6.

As is readily apparent, the sliding mem-' bers 10 are vertically movable u on the rods 8 and 9, and with them move t e stop lugs 12. In accordance with the present invention, the positions of the sliding members 10-are so controlled in accordance with the current price of unit volumes of the liquid dispensed, as to correspond to the limiting positions of the-pump rod for dispensing volumes of the liquid, for example, gasoline, corresponding to related fixed values, such as given multiples of a fixed unit value, for example, twenty-five cents. Thus, in the form illustrated, four such sliding mem- Lers 10 may be provided, and the values of the volumes of gasoline or other liquid dispensed on operation of the lugs corresponding to the respective sliding members may be, for example, twenty-five cents, fifty cents, seventy-five cents and a dollar respectively. In the form of construction shown, means are illustrated for setting the positions of all of the sliding members-in accordance with current prices of unit volumes of the liquid.

- .In the form illustrated, a sector 16 is pivoted within the casing near its lower end,

-with one face opposite the sliding members 10 and provided with ,cam grooves 17 in which are slidably engaged the pins 18 projecting 'from the sliding members 10. Near its upperend the sector 16 is provided with an externally projecting handle 19, which passes through an arcuate slot in the front portion 7 of the casing 7. An indicating pointer 20 is secured to the handle 19 and markings are provided on the casing 7 upon which markings are designated varying prices for unit volumes of the gasoline or other liquid dispensed. In the form illustrated these prices range from sixteen to twenty cents per gallon. The cam grooves in the sector 16 are so formed as to position the sliding members 10 and the corresponding stop lugs 12 properly for the dispensing of volumes of gasoline corresponding to the position to be engaged by the pump total value of twenty-five cents and multi ples thereof when the proper stop lugs are engaged by the pump rod in its upper movement. By the operation of the handles let and the rod 13, the stop lugs 12 are controlled to dispense the volume of gasoline having the value set by the customer.

It is readily apparent that other mechanical movements may be employed to produce the same results as the sector and cams above specifically referred to, and that the details of the specific construction set forth are not to be regarded as limitations upon the scope of the invention, except in so far as included in the accompanying claims.

' Iclaim: I y l 1. In a liquid dispensing pump, a reciprocable pump rod, a plurality of stops selectively movable into position to be engaged by the pump rod and thereby limit move ment of the latter, and means for simultano ously moving the stop members substantial- 1y parallel to the line of movement of the pump rod to positions corresponding to the dispensing of volumes of liquids having values which are multiples of a given fixed value in accordance with the price of a unit volume of the liquid.

2. In a pump construction, a reciprocable pump rod, a plurality of vertically movable stop members, means for bringing a selected one of said stops into alinement with -the pump rod to limit its movement, and means for simultaneously moving said stop members into'positionscorresponding to the limiting positions of the pump rod for dispensing total volumes of gasoline having fixed related values atvarying prices per unit volume.

'3. In a pump construction, a reciprocable pump rod, a vertically movable stop member adapted to be alined with the pump rod to limit its movement and determine'the volume of liquid dispensed, a movable indicator member adapted to be set to indicate the current price per unit volume of the liquid, and means controlled by said indicator for vertically moving the stop member to positionscorresponding to total volumes of liquid having identical values.

4. In a pump construction, a reciprocable pump rod, a plurality of vertically movable stop members, means for bringing a selected one of said stops into co-operation with the pump rod to limit its movement and determine the volume of liquid dispensed, a movable indicator member adapted to be set to indicate thecurrcnt price per unit volume of the liquid, and means controlled by said indicator for simultaneously vertically moving the stops to positions corresponding to total volumes of the liquid having identically related values. I

- 5. In a pump construction, a reciprocable pump rod, a plurality of vertically movable stop members, means for bringing a selectedone of said stop members into cooperation with the pump 'rod to,limit its movement and determine the'volume of liquid dispensed, a, cam member having means controlling the vertical positions of said stop members 'whereby, in all positions of the cam member, the positions of the stop members correspond to total, volumes of the liquid having identically related values, and means for moving the cam member to positions COII'PSPODCllIIg to varying prices per unit volume of the liquid.

6. In a pump construction, a reciprocable pump rod, a plurality of vertically movable stop members, means for bringing a selected one of said stop members into coop-' oration with the pump rod to limit. its movement and determine the volume of liquid dispensed, said stop members having alined projecting pins, a pivotallv movable sector member having cam grooves in which said pins are slid-ably engaged, and means for moving the sector member to positions coi responding to varying prices per unit volume of the liquid, said cam grooves being so constructed that the positions of the stop members correspond at all times to total volumes of the liquid having identically related values.

ROBERT E. WILSON, 

